Teaching Superfluidity at the Introductory Level

I've only glanced through briefly this preprint, but from what I can see, it might provide a useful intro to superfluidity to undergraduate students, and even to those with some physics background. This isn't a topic that is dealt with in extensive details at the modern physics intro level, so it might fill a gap (no pun intended).

If you have read this and have comments about it, I'd like to hear them, especially if my impression of it isn't accurate.

Zz.